Just install g16 as you normally would with any Intel CPU, and add PGI_FASTMATH_CPU=haswell at the end of $g16root/g16/bsd/g16.profile. source it as you normally would.
Tested to work with G16 Rev. A03 AVX2 version on AMD Ryzen 7 4800U, with Ubuntu 20.04 LTS.
hrishikesh-vm@hrishikesh:~$ g16 sds.com &
[1] 32759
hrishikesh-vm@hrishikesh:~$ Error: illegal instruction, illegal opcode
rax 0000000000e51dd0, rbx 00007ffceb72e990, rcx 00007ffceb72e990
rdx 00007ffceb72e960, rsp 00007ffceb72e8b8, rbp 00007ffceb72e8c0
rsi 00007ffceb72e968, rdi 00007ffceb72e8f8, r8 0000000000000044
r9 0000000000e38370, r10 0000000000000012, r11 0000000000000012
r12 00000000010dc930, r13 00007f5ea2a2dc78, r14 00007f5ea2a1be28
r15 00007f5ea2a185e8
/lib/x86_64-linux-gnu/libpthread.so.0(+0x143c0) [0x7f5ec45723c0]
/home/hrishikesh-vm/Downloads/gaussian/g16/l101.exe() [0xe51e7a]
Aborted (core dumped)
[1]+ Exit 1 g16 sds.com
hrishikesh-vm@hrishikesh:~$ I have this error. What should I do now
I have followed this video tutorial on youtube
Update: I noticed some non-consistency in the result between Intel and AMD. Use with caution!
@hrishiksh Do you mind sharing your cpu arch information? The flag PGI_FASTMATH_CPU=haswell is arch-dependent.
PGI_FASTMATH_CPU=sandybridge works for Ryzen 7 4800H in Ubuntu 22.04
tested with RYZEN 9 5900HS under ubuntu 21.10